Allow adding Java activities to the manifest

buildozer/default.spec

@@ -146,6 +146,9 @@ fullscreen = 0
 # bootstrap)
 #android.gradle_dependencies =
 
+# (list) Java classes to add as activities to the manifest.
+#android.add_activites = com.example.ExampleActivity
+
 # (str) python-for-android branch to use, defaults to stable
 #p4a.branch = stable
 

buildozer/targets/android.py

@@ -719,6 +719,11 @@ class TargetAndroid(Target):
                 raise SystemError('Failed to find jar file: {}'.format(
                     pattern))
 
+        # add Java activity
+        add_activities = config.getlist('app', 'android.add_activities', [])
+        for activity in add_activities:
+            build_cmd += [("--add-activity", activity)]
+        
         # add presplash
         presplash = config.getdefault('app', 'presplash.filename', '')
         if presplash: